And here is my bizzare theory! TONY IS GOING TO DIE!!!! 😭😭😭😭😭😭😭. Remember this, I'll refer to this as the infinity war logic, the first scene in infinity war trailer is the last scene in infinity war. So applying the same logic the first scene in endgame trailer is the last scene in end game. So at the end of end-game you can expect Tony to drift off into space. Now, another thing my theory explains is why Tony's mask is damaged on the right side instead of left. As shown in the trailer Tony does come back to Earth, he then fights with the villian and that causes his mask to break on the right. It is in the same fight that he is forced to space, which explains that the infinity war logic is true, that Tony floating into space at the end is true. You can even see a part of the final fight as nebula charges at someone in space,(this probably is the final fight). And then in the trailer Tony on Earth is seen smiling which tells us that he is happy over the fact that pepper is alive. Which is exactly why he is seen transmitting to pepper in the end(when drifting off in space). So my theory makes it clear that Tony comes back to Earth but later drifts off into space again, explaining and justifying what is shown in all of the trailers of endgame. I think my theory might be true because it justifies whatever is shown in the trailers. You can repost it but give me credits on the post, not in the caption